How can I do if I delete iCloud?

Hi NatalieLin168,

Thank you for participating in the Apple Support Communities. We understand you'd like to restore a backup to your iPhone. It looks like you've come from a helpful article: Restore your iPhone, iPad, or iPod touch from a backup - Apple Support. You need to have a backup in iCloud or on your computer. If you don't have one, you won't be able to restore a backup.

You can use the iCloud website to restore some iCloud information that is not included in a backup. This article explains more about this: Use iCloud.com to restore and recover iCloud information - Apple Support.

"You can use iCloud.com on a computer to recover recently deleted files or restore an earlier version of information that was automatically archived in iCloud.

See any of the following:

• Calendar: Restore your calendars and events on iCloud.com
• Contacts: Restore contacts stored in iCloud on iCloud.com
• iCloud Drive, Pages, Numbers, and Keynote: Recover deleted files on iCloud.com
• iCloud Photos: Delete and recover photos and videos on iCloud.com
• Mail: Delete email in Mail on iCloud.com
• Notes: Delete and recover notes on iCloud.com
• Reminders: Restore your reminders on iCloud.com
• Safari bookmarks and Reading List: Restore your Safari bookmarks and Reading List on iCloud.com"

We hope this helps.

Take care.